FIELD: furniture production.
SUBSTANCE: invention relates to a composite ladder with an integrated rigid anchor line, which serves to provide lifting on trapezoidal, round, cone-shaped, multifaceted supports of overhead power transmission lines, telecommunication towers and other equipment, on which it is necessary to lift. Technical result is achieved by the fact that the composite ladder comprises a main section, at least one intermediate section, an upper section consisting of racks connected by steps, assemblies of attachment to the support, units for connecting sections to each other, a device for preventing falling from a ladder, a rigid anchor line with a carriage moving along it, wherein a rotary locking lever is fixed in the carriage body, at that, the attachment points to the support are the supports of the sections in the support, wherein each support is M-shaped and includes a galvanized metal cable or a synthetic cable, connection of sections to each other is made by guide pins with hemispherical head, located in upper part of post and connected by M-shaped stops, wherein the rigid anchor line is formed by a Ω-shaped profile, which is turned through angle of 10±5° to the frontal plane of at least one intermediate section and the upper section, wherein the carriage consists of a body with built-in rotating rollers located along the inner side surfaces of the carriage body, which contributes to its uniform movement, wherein fixation of carriage is carried out due to uniformly distributed steps of tooth-like shape made in form of segment on Ω-shaped profile, made with triangular profile in section of tooth, wherein the Ω-shaped profile, steps with a tooth-like shape in the cross-section of the sections and the carriage body are made from an aluminum-based alloy, wherein the weight fraction of the remaining chemical elements is: silicon 0.7–1.3%; magnesium 0.6–1.2%.
EFFECT: higher reliability.
1 cl, 9 dwg
